输入采样阶段是PLC的中央处理器,对各输入端进行扫描,将输入端信号送入()。
A、累加器
B、指针寄存器
C、状态寄存器
D、存贮器
参考答案:C
Read and judge. (读短文,判断下列语句是否正确.正确的画“√”,错误的画“×”)
Hello! My name is Anna. I am a girl and I'm from China. I have a happy family. My father and
my mother are teachers. My grandma is a nice woman. She keeps (养) a cat at home. I have two
friends. They are Kelly and Bobby. We often fly kites in the park.
( )1. Anna is a Canada girl.
( )2. Anna's mother is a teacher.
( )3. Anna's grandmother keeps a dog at home.
( )4. Anna often flies the kite in the park.
以丸为单位的制剂是()
A.片剂
B.丸剂
C.溶液剂
D.软膏剂
E.颗粒剂